Development characteristics and construction prospects for a multi-integrated economic zone in the South China Sea Region     

Jin  Fengjun  Yao  Zuolin  Chen  Zhuo 《地理学报(英文版)》2021,31(3):403-422

The Belt and Road Initiative(BRI)instigated by China is catalyzing the evolution of a new global economic landscape.To cope with the great changes in the economic landscape,China needs to view the South China Sea Region(SCSR)as a strategic focus and study carefully the characteristics of regional development and explore the possibility for construc-tion of a strategic multi-integrated economic zone which includes China and ASEAN countries.Based on key indicators,this paper outlines the overall development characteristics of the SCSR and analyzes the regional structural characteristics of industry and global trade based on the indexes of industrial structure similarity and trade commodity structure coincidence;the paper also depicts the spatial characteristics of the nine core growth areas(CGAs)in the region and discusses the construction prospects for a multi-integrated economic zone in the SCSR.The results show that,first,from 2000 to 2017,the main economic indicators of the SCSR grew quite well,and the development trend was much better than the global average for the same period.Second,driven by the global industrial transfer stages and spatial paths,the level of comprehensive development in the SCSR has evolved into four categories.Third,the index values for industrial structure similarity and trade commodity structure coincidence for the 11 countries in the SCSR have remained at a high level,and reveal an integration trend not only from the horizontal and vertical perspective,but also from an upgrading and downgrading standpoint.Fourth,nine CGAs have been established in the SCSR and the advantaged industries and the export commodity types between different countries exhibited the characteristics of convergence and complementarity due to the polarization and diffusion effects of the CGAs.Finally,from a long-term perspective,the SCSR has already acquired the internal and external conditions such as the 5th global industrial transfer initiative,the reconstruction of the global value chain,regional production-consumption networks and spa-tial entities for building a multi-integrated economic zone in the SCSR.  相似文献   

海洋动物适应性演化与多样性研究进展     

张琳琳  李勇男  翁洁羊  李杰  王月  李倩 《海洋与湖沼》2021,52(2):433-449

海洋生物多样性是海洋生态系统的重要组成部分,了解海洋生物多样性的形成演化过程不仅是生命科学的本质问题,而且对海洋生物资源的保护和开发利用具有重要的指导意义.目前海洋生物多样性的形成演化机制尚不明确,而性状多样性的起源和适应性演化为回答海洋生物多样性的内源性机制提供了重要突破口.本文从演化发育生物学的角度综述了海洋动物适...  相似文献   

印太交汇区海洋鱼类多样性格局与演化研究进展     

刘静  肖永双 《海洋与湖沼》2021,52(2):498-507

印太交汇区不仅是热带物理海洋海气能量汇聚中心、地质板块活跃中心以及生物多样性中心,而且也是用于开展地球系统物质能量交换与全球气候变化以及海洋生物多样性起源研究的理想靶区,因此一直受到世界科学家们的广泛关注.作为全球34个生物多样性热点区域之一,印太交汇区的珊瑚礁三角区孕育了全球76％的造礁珊瑚、75％的红树林、50％的...  相似文献   

阿克苏地区西部冰雹天气雷达回波演变特征分析          下载免费PDF全文

安大维  陈春艳  孙鸣婧  窦刚  刘军建 《沙漠与绿洲气象(新疆气象)》2022,16(6):59-66

利用2009—2020年阿克苏地区西部6县市中国气象局灾情直报、地面观测、阿克苏多普勒雷达资料，分析阿克苏雷达监测覆盖区冰雹天气时空分布及雹云雷达回波演变特征，结果表明：（1）2009—2020年共出现211站次冰雹，2011年最多，28站次；高发期为5—8月，6月冰雹频次最高；日变化峰值在16—19时。（2）雹云单体最强反射率因子均≥52 dBZ，回波顶高高于8 km，垂直累积液态水含量跃增达4.47 kg/m2及以上且垂直累积液态水含量最大值大于10.0 kg/m 2时雷暴单体发展为雹暴的可能性极大。超级单体雹暴反射率因子、回波顶高、VILmax统计指标均高于多单体和普通单体雹暴。（3）普通单体风暴多初生于乌什县、温宿县北部沿山一带；多单体雹云多初生于乌什县西部南部、温宿县北部沿山一带，乌什县境内最多；超级单体雹云多初生于温宿县。回波单体移动大多以西北-东南路径为主。（4）雹云回波发展初期往往伴随着第一次爆发式增长：反射率因子增大、回波顶升高、VIL跃增，超级单体雹暴表现更为明显，降雹时刻伴随着再一次爆发式增长。VIL急剧增大或急剧减少与降雹开始和结束关系最为密切。（5）超级单体雹暴维持时间和整体生命史均较多单体雹暴和普通单体雹暴时间长；多单体风暴需要较长的酝酿时间且影响区域较大。  相似文献   

ERA-interim气温、地温再分析数据在青海东部农业区的适用性评估          下载免费PDF全文

陈奇  祁栋林 《沙漠与绿洲气象(新疆气象)》2023,17(1):69-76

利用1999—2018年逐月ERA-interim再分析数据，选取青海省东部农业区的15个气象站点平均气温和土壤温度，采用误差和相关性分析，对比两种资料时间和站点空间变化规律，并对ERA-interim再分析资料的准确性进行验证评估。结果表明：ERA-interim再分析数据平均气温、5和15 cm土壤温度均低于观测值，分别偏低3.5、4.3和4.5℃；观测值与订正前后的再分析资料月际和季节变化基本一致，空间变化均表现出从东南部向西北部减小的趋势，而且最大值和最小值出现的站点完全一致。近20年来，观测值与再分析资料平均气温均呈现上升趋势，5和15 cm土壤温度观测值表现为升高趋势，而再分析数据呈减小趋势。与订正前相比，订正后的再分析资料与观测值的平均偏差和均方根误差明显减小，同时平均偏差和均方根误差年际变化均呈先增大后减小的趋势。年内平均偏差和均方根误差均呈现“M”型，最大值均出现在4月，最小值出现在12或1月。东部农业区地形复杂、海拔高度差异是再分析资料比观测值偏低的主要原因，利用回归方程实现平均气温和土壤温度再分析数据的订正，有效降低了ERA-interim再分析数据的偏差，提高再...  相似文献   

基于GIS技术的西南三江北段矿产资源定量预测与评价   总被引：14，自引：2，他引：12  

陈建平  王功文  侯昌波  唐菊兴 《矿床地质》2005,24(1):15-24

在已经建立的中国三江北段地质矿产数据库的基础上,运用加拿大数学地质学家Agterberg提出的证据权重法,并基于MAPGIS技术平台和数理统计分析方法,以及AreView中的证据权模块,对西南三江北段地区进行矿产资源定量预测与评价,为区域矿产资源的勘测与开发提供科学依据。  相似文献   

中国三江源地区降水研究的进展与展望     

姚秀萍  谢启玉  黄逸飞 《大气科学学报》2022,45(5):688-699

三江源地区位于中国青藏高原腹地，被誉为“中华水塔”。该地区降水和空中云水资源的分布及变化对中国淡水资源的影响至关重要，且影响着三江源地区及下游的生态系统。本文回顾和总结了近几十年来三江源地区降水和空中云水资源的空间分布及时间演变特征、降水的影响机制以及未来降水趋势预测方面的研究成果，并给出了进一步研究展望。  相似文献   

基于DEM的三峡区间洪水淹没范围模拟   总被引：7，自引：0，他引：7  

李春红任立良  左振鲁江浩 《水文》2005,25(1):1-4

基于栅格型数字高程模型，采用VC 6．0和MapObjects进行三峡区间的洪水淹没模拟，包括数字高程模型数据的预处理、矢量与栅格数据的一体化管理、无源淹没和有源淹没分析模拟。应用结果表明：洪水淹没区范围可以准确计算，洪水淹没过程的动态可以清楚地图示，这为灾情评估和防洪决策提供了科学依据。  相似文献   

Isothermal compression of an eclogite from the Western Gneiss Region (Norway)     

Martin Simon  Pavel Pitra  Philippe Yamato  Marc Poujol 《Journal of Metamorphic Geology》2023,41(1):181-203

In the Western Gneiss Region in Norway, mafic eclogites form lenses within granitoid orthogneiss and contain the best record of the pressure and temperature evolution of this ultrahigh-pressure (UHP) terrane. Their exhumation from the UHP conditions has been extensively studied, but their prograde evolution has been rarely quantified although it represents a key constraint for the tectonic history of this area. This study focused on a well-preserved phengite-bearing eclogite sample from the Nordfjord region. The sample was investigated using phase-equilibrium modelling, trace-element analyses of garnet, trace- and major-element thermobarometry and quartz-in-garnet barometry by Raman spectroscopy. Inclusions in garnet core point to crystallization conditions in the amphibolite facies at 510–600°C and 11–16 kbar, whereas chemical zoning in garnet suggests growth during isothermal compression up to the peak pressure of 28 kbar at 600°C, followed by near-isobaric heating to 660–680°C. Near-isothermal decompression to 10–14 kbar is recorded in fine-grained clinopyroxene–amphibole–plagioclase symplectites. The absence of a temperature increase during compression seems incompatible with the classic view of crystallization along a geothermal gradient in a subduction zone and may question the tectonic significance of eclogite facies metamorphism. Two end-member tectonic scenarios are proposed to explain such an isothermal compression: Either (1) the mafic rocks were originally at depth within the lower crust and were consecutively buried along the isothermal portion of the subducting slab or (2) the mafic rocks recorded up to 14 kbar of tectonic overpressure at constant depth and temperature during the collisional stage of the orogeny.  相似文献   

喀喇昆仑黑山头铜多金属矿地质特征与找矿标志          下载免费PDF全文

梁东  华北  唐魏子  万生楠  梁孝伟  杨志鹏 《地质找矿论丛》2022,37(2):156-163

黑山头铜多金属矿是喀喇昆仑阿克赛钦地区新发现的小型铜多金属矿床。矿床初步地质勘查表明,铜多金属矿体主要赋存于长城系甜水海岩群和志留系温泉沟组粉砂岩中,受NW向断裂控制,共圈定矿体4条,其中Ⅱ-1和Ⅲ-1号等主矿体长100~650 m,厚1.29~4.07 m,呈脉状、透镜体状、似层状,成矿元素为Cu、Au、Pb、Zn、Ag,总体上矿石品位不高,矿化不均匀。矿石矿物主要为孔雀石、铜蓝、黄铜矿、方铅矿、闪锌矿,脉石矿物主要有绢云母,石英、方解石和泥质等。围岩蚀变主要为绢云母化、碳酸盐化、褐铁矿化。根据矿体赋存特征和围岩蚀变特点,推测成矿与热液活动有关,矿床成因为构造热液型。通过矿床地质特征归纳出矿区地球化学、地球物理、地层岩性矿物组合、构造、围岩蚀变等找矿标志,为下一步勘查评价和区域找矿提供参考。  相似文献